TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 387 of 1205
I REFERENCE INFORMATION --i Replace harness or repair wiring (para. 4-80). -I Replace harness or repair wiring (para. 4-80). Be sure the charging system is functioning properly before replacing the voltmeter. Run the alternator tests, page Z-199, if you’re not sure. Replace voltmeter (para. 4-16). TM 9-2320-387-24-l INSTRUMENTS CIRCUIT DC VOLTAGE O-45 VOLTS STE/lCE-R TEST 89 1. Connect RED clip to the indicated test point, BLACK clip to negative or ground. 2. Start Test 89. DC Volts. 3. Displayed reading is in volts. BAITERY VOLTAGE MULTIMETER 1. Set the voltmeter to a DC volts scale of at least 40 volts. 2. Connect the RED lead to positive and the BLACK lead to negative. 3. Be sure to read the correct scale. I RESISTANCE AND CONTINUITY I 04.500 OHMS STEkE-R TEST 91 1. Connect RED dip and BLACK clip to the indicated terminals in the question. RED to the first, BLACK to the second. I 2. Start Test 91,0-4,500 Ohms. 3. Displayed reading is in ohms. Less than 5 ohmr is continuity. If the resistance is over 4,500 ohms, STEIfCE-R displays .9.9.9.9. CONTINUITY (RESISTANCE) MULTIMETER I 1. Set the voltmeter to an ohms scale of about 1,000 ohms. 2. Connect the RED and BLACK leads to the connections stated in the question. 3. Be sure to read the correct scale. Less than 5 ohms indicates continufty. For an open circuit, the meter should peg full scale (needle all the way to the left). 2-333